Notice.md

gmock原理介绍及使用

Author：junqiang.zhang

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单元测试的目的是什么？

保证代码质量

保证代码的可维护

保证代码的可扩展

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如何写单元测试？

func Add(a,b int)int {
 
   return a+b
}



func main() {

  s:=Add(1,4)
  if s!=5 {
    panic("Add Fail")
  }

}

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传统的单元做法是怎么做的？mock

// Interface
type Foo interface {
  Bar(x int) int
}

func SUT(f Foo) {
 // ...
}

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传统的单元做法是怎么做的？mock

// Mock Interface
func TestFoo(t *testing.T) {
  ctrl := gomock.NewController(t)
  defer ctrl.Finish()
  m := NewMockFoo(ctrl)
  m.EXPECT().Bar(gomock.Eq(99)).
    DoAndReturn(func(_ int) int {
      time.Sleep(1*time.Second)
      return 101
    }).
    AnyTimes()
  SUT(m)
}

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实际情况(MVC)

//Controller
type Jira struct {
	JiraService *service.Jira
	//JiraRepo    dependency.JiraRepo
}
func (j *Jira) PostList(ctx context.Context, req *dto.JiraQueryReq) rest.Response {
	jiraList, total, message, err := j.JiraService.Query(ctx, req)
	resp := dto.NewResponseDto(err)
	if err != nil {
		return resp
	}
	resp.SetData(jiraQueryDTO(jiraList, total, message))
	return resp
}

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实际情况

//Service
type Jira struct {
	JiraFactory       *aggregate.JiraFactory
	FlowFactory       *aggregate.FlowFactory
	FlowTemplateRepo  dependency.FlowTemplateRepo
	GroupConfRepo     dependency.GroupConfRepo
	JiraOperationRepo dependency.JiraOperationRepo
  JiraRepo    dependency.JiraRepo
}

func (j *Jira) Query(ctx context.Context, req *dto.JiraQueryReq) ([]*entity.Jira, int, string, infra.Exception) {
	cmd, _ := j.JiraFactory.NewJiraQueryCmd(ctx)
	return cmd.Query(req)
}

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实际情况

// Aggregation
type JiraFactory struct {
	JiraRepo          dependency.JiraRepo
	JiraOperationRepo dependency.JiraOperationRepo
}

func (j *JiraFactory) NewJiraQueryCmd(ctx context.Context) (*JiraQueryCmd, error) {
	return &JiraQueryCmd{
		jiraRepo:          j.JiraRepo,
		jiraOperationRepo: j.JiraOperationRepo,
		ctx:               ctx,
	}, nil
}

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实际情况

// dependency
type JiraRepo interface {
	GetByJiraId(ctx context.Context, jiraId int) (*entity.Jira, infra.Exception)
}

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实际情况

// Repo
type Jira struct{

}

func (repo *Jira) GetByJiraId(ctx context.Context, jiraId int) (jiraEntity *entity.Jira, e infra.Exception) {
	jiraEntity = &entity.Jira{}
	jiraEntity.JiraId = jiraId
	err := findJiraTab(ctx, jiraEntity)
	if err != nil {
		e = parseErr(err)
	}
	return
}

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为什么传统的单元测试很难持续实施？

接口隔离

分层测试

使用Mock

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思考？

如何让单元测试变得简单？

如何保证单元测试是有效的？

如何保证单元测试可持续？

如何让开发喜欢单元测试？

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解决方案 ？

https://github.com/sjqzhang/gmock